HNS-Ⅳ炸药的短脉冲冲击起爆判据

Flyer shock-initiated HNS-Ⅳ explosive is an important topic in the research of the in-line explosive train.In this study,with the influence of the energy loading method,which may be electrical explosion,laser and micro charge detonation,and flyer material on the shock initiation taken into consideration,the parameters of pⁿτ and the James criteria for HNS-Ⅳ explosive were obtained according to flyer threshold velocity measured by literatures.Meanwhile,the process of initiating HNS-Ⅳ explosive the flyer driven by copper azides was simulated using the ANSYS/LS-DYNA program,based on whose results the parameters of pⁿτ and the James criteria for HNS-Ⅳ explosive were adjusted.It was found that the pⁿτ criteria for HNS-Ⅳ explosive should be adjusted to p^2.08τ>1.54 GPa^2.08•μs(0.001 μs<τ<0.14 μs,3.8 GPa<p<28.0 GPa),while the James criteria should be adjusted to 0.215/Σ+0.108/E<1.The two adjusted criteria,which might have a higher practicability,were consistent with the simulation results.